Crossword Genius

Separate clue for trifle? (6,3)

Ross

I believe the answer is:

filter out

I'm a little stuck... Click here to teach me more about this clue!

'separate' is the definition.
(filtering out is a kind of separating)

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for filter out that I've seen before include "Use technique to remove muck" , "clear" .)

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